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Is the energy balance in a tropical lowland rice perfectly closed?

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Title Is the energy balance in a tropical lowland rice perfectly closed?
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Creator Chatterjee, D., Swain C.K., Chatterjee, S., Bhattacharyya, P., Tripathi, R., Lal, B., Gautam, P., Shahid, M., Dash P.K., Dhal, B. and Nayak, A.K.
 
Subject heat flux partitioning, energy balance closure, energy balance ratio, eddy covariance, residual heat flux, rice
 
Description Not Available
A two-year (2015 and 2016) field experiment was carried out to study the surface energy budget and energy
balance closure (EBC) in a tropical lowland rice paddy in Cuttack, India. Maintenance of a standing water
layer in lowland irrigated rice ecosystem makes it unique and this strongly influences the surface energy
balance which may alter the surface runoff, ground water storage, water cycle, surface energy budget, and
possibly microclimate of the region. To study this, an experiment was conducted using eddy covariance system
to measure the surface energy balance components during two cropping seasons (dry season, DS and wet
season, WS) and two consecutive fallow periods (dry fallow, DF and wet fallow, WF). The rice was grown
in puddled wet lands in DS and WS and the ground was left fallow (DF and WF) during the rest of the year.
Results displayed that daily average latent heat flux at surface (LE) and at canopy height (LEc) dominated
over sensible heat flux at surface (H) and canopy height (Hc), respectively due to the presence of water source
coming from the standing water in the rice field. The EBC was evaluated by ordinary least square (OLS),
energy balance ratio (EBR) and residual heat flux (RHF). In OLS, the slope ranged 0.38-0.89 (2015) and
0.28-0.99 (2016) during the study period. Average RHF was 10.3-12.0% higher in WS as compared to DS. It
was concluded that the EBC estimated using RHF is the most suitable way to calculate closure for lowland
rice paddy since it can distinguish different seasons distinctively, followed by OLS. Much variation was not
observed in EBR after inclusion of storage terms (water, soil, photosynthesis, canopy) to the classical EBR.
ICAR
 
Date 2021-01-01T11:02:26Z
2021-01-01T11:02:26Z
2020-02-18
 
Type Research Paper
 
Identifier Chatterjee, D., Swain C.K., Chatterjee, S., Bhattacharyya, P., Tripathi, R., Lal, B., Gautam, P., Shahid, M., Dash P.K., Dhal, B. and Nayak, A.K., 2020. Is the energy balance in a tropical lowland rice perfectly closed? Atmosfera, 34(1), pp.59-78.
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http://krishi.icar.gov.in/jspui/handle/123456789/44387
 
Language English
 
Relation Not Available;
 
Publisher Universidad Nacional Autónoma de México (UNAM)